The calculations are intended for the use case for the owner of the website. If you like to use the calculations, be my guest. It is not intended to be complete! Only as a working tool for an analog photographer.

Bellows Extension – Exposure Compensation Calculator

Focal length (mm):

Bellows extension (mm):

Calculate

Schwarzschild effect calculator

Rollei RPX 400

Effective exposure time (Seconds):

Calculate

CineStill 50D

Effective exposure time (Seconds):

Calculate